Hard batch G0022-G0026: 5/5 accepted; budget floor, CDS checks, mutation check

- generator: budget floor (2x oracle activations, 3x calls), static checks for CDS
  $parameters and UNION annotation
- harness/mutation.py: deterministic mutants of the reference; hidden tests must fail
- G0022 revalidated with harness fixes: oracle 100, null 0
- results in docs/faz1-tasarim.md 11f

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tasks_gen/eval/G0023/seed/freight_legacy.clas.abap

@@ -0,0 +1,61 @@
+CLASS {{p}}freight_legacy DEFINITION PUBLIC FINAL CREATE PUBLIC.
+  PUBLIC SECTION.
+    INTERFACES {{p}}if_freight_calc.
+ENDCLASS.
+
+
+CLASS {{p}}freight_legacy IMPLEMENTATION.
+  METHOD {{p}}if_freight_calc~calculate.
+    DATA: lv_base      TYPE {{p}}if_freight_calc=>ty_amount,
+          lv_per_kg    TYPE {{p}}if_freight_calc=>ty_amount,
+          lv_minimum   TYPE {{p}}if_freight_calc=>ty_amount,
+          lv_surcharge TYPE p LENGTH 4 DECIMALS 3,
+          lv_charge    TYPE {{p}}if_freight_calc=>ty_amount,
+          lv_freight   TYPE {{p}}if_freight_calc=>ty_amount,
+          lv_fee       TYPE {{p}}if_freight_calc=>ty_amount,
+          lv_total     TYPE {{p}}if_freight_calc=>ty_amount.
+
+    CASE iv_zone.
+      WHEN 'DE'.
+        lv_base      = '12.50'.
+        lv_per_kg    = '0.85'.
+        lv_minimum   = '25.00'.
+        lv_surcharge = '0.065'.
+      WHEN 'FR'.
+        lv_base      = '15.00'.
+        lv_per_kg    = '1.10'.
+        lv_minimum   = '30.00'.
+        lv_surcharge = '0.075'.
+      WHEN 'NL'.
+        lv_base      = '10.00'.
+        lv_per_kg    = '0.75'.
+        lv_minimum   = '20.00'.
+        lv_surcharge = '0.055'.
+      WHEN 'US'.
+        lv_base      = '20.00'.
+        lv_per_kg    = '1.40'.
+        lv_minimum   = '45.00'.
+        lv_surcharge = '0.085'.
+      WHEN 'CN'.
+        lv_base      = '25.00'.
+        lv_per_kg    = '1.25'.
+        lv_minimum   = '50.00'.
+        lv_surcharge = '0.095'.
+      WHEN OTHERS.
+        rv_cost = 0.
+        RETURN.
+    ENDCASE.
+
+    lv_charge = lv_per_kg * iv_weight.
+    lv_freight = lv_base + lv_charge.
+    IF lv_freight < lv_minimum.
+      lv_freight = lv_minimum.
+    ENDIF.
+    lv_fee = lv_freight * lv_surcharge.
+    lv_total = lv_freight + lv_fee.
+    IF iv_weight > '1000.000'.
+      lv_total = lv_total * '0.95'.
+    ENDIF.
+    rv_cost = lv_total.
+  ENDMETHOD.
+ENDCLASS.